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5
Motor control (MCTRL)
5.10
Parameterisable additional functions
262
Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
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5.10.2
Operation with increased rated power
Under the operating conditions described here and under continuous operation, the inverter can be
operated with a higher power motor (increased rated power). The remaining overload capacity of
the drive system (for 60 s/3 s) is reduced accordingly to approx. 120 %/160 %.
Typical applications stand out due to low dynamic requirements, e.g. pumps and fans, general
horizontal materials handling technology and line drives.
Required parameterisation
Operation at increased rated power requires the following settings to be made particularly for the
V/f characteristic control (VFCplus), but also for all other types of control:
The inverters which can be operated at an increased rated power are listed in the
8400
hardware manual
in the rated data. The hardware manual is stored in electronic form on
the data carrier which is supplied with the 8400 inverter.
Stop!
Operation at increased rated power is only permitted ...
• with the inverters listed in the
8400 hardware manual
for this type of operation in the
stated mains voltage range.
• at switching frequencies of 2 kHz and 4 kHz.
• at a max. ambient temperature of 40 °C.
• with the types of installation stated in the
8400 hardware manual
.
• with the fuses, cable cross-sections, mains chokes, and filters as required in the
8400
hardware manual
for this operation.
• after parameterisation according to the specifications below.
Parameters
Info
Required setting
VFC: Vmin boost
adapt to motor
(reduce)
Switching frequency
1: 4 kHz var./drive-opt.
Slip compensation
adapt to motor
Setting of motor overload (I²xt)
adapt to motor
Device utilisat. threshold (Ixt)
120 %
Mains voltage
see hardware manual
Rated data